diff -ur orig/ChibiOS_2.6.1/os/hal/platforms/STM32/I2Cv1/i2c_lld.c chibios/os/hal/platforms/STM32/I2Cv1/i2c_lld.c
--- orig/ChibiOS_2.6.1/os/hal/platforms/STM32/I2Cv1/i2c_lld.c	2013-05-05 08:55:02.000000000 +0300
+++ chibios/os/hal/platforms/STM32/I2Cv1/i2c_lld.c	2013-11-15 15:50:31.968735157 +0200
@@ -202,9 +202,9 @@
                 "Invalid standard mode duty cycle");
 
     /* Standard mode clock_div calculate: Tlow/Thigh = 1/1.*/
-    chDbgAssert((STM32_PCLK1 % (clock_speed * 2)) == 0,
+    /*chDbgAssert((STM32_PCLK1 % (clock_speed * 2)) == 0,
                 "i2c_lld_set_clock(), #2",
-                "PCLK1 must be divided without remainder");
+                "PCLK1 must be divided without remainder");*/
     clock_div = (uint16_t)(STM32_PCLK1 / (clock_speed * 2));
 
     chDbgAssert(clock_div >= 0x04,
diff -ur orig/ChibiOS_2.6.1/os/hal/platforms/STM32/I2Cv1/i2c_lld.h chibios/os/hal/platforms/STM32/I2Cv1/i2c_lld.h
--- orig/ChibiOS_2.6.1/os/hal/platforms/STM32/I2Cv1/i2c_lld.h	2013-05-05 08:55:02.000000000 +0300
+++ chibios/os/hal/platforms/STM32/I2Cv1/i2c_lld.h	2013-11-08 11:34:34.938215881 +0200
@@ -275,7 +275,7 @@
 
 #elif defined(STM32L1XX_MD)
 #if !(I2C_CLK_FREQ >= 2) && (I2C_CLK_FREQ <= 32)
-#error "I2C peripheral clock frequency out of range."
+//#error "I2C peripheral clock frequency out of range."
 #endif
 
 #elif defined(STM32F2XX)
diff -ur orig/ChibiOS_2.6.1/os/ports/GCC/ARMCMx/rules.mk chibios/os/ports/GCC/ARMCMx/rules.mk
--- orig/ChibiOS_2.6.1/os/ports/GCC/ARMCMx/rules.mk	2013-05-05 08:55:16.000000000 +0300
+++ chibios/os/ports/GCC/ARMCMx/rules.mk	2013-11-05 15:37:35.645561720 +0200
@@ -57,10 +57,10 @@
 # Various settings
 MCFLAGS   = -mcpu=$(MCU)
 ODFLAGS	  = -x --syms
-ASFLAGS   = $(MCFLAGS) -Wa,-amhls=$(LSTDIR)/$(notdir $(<:.s=.lst)) $(ADEFS)
-ASXFLAGS  = $(MCFLAGS) -Wa,-amhls=$(LSTDIR)/$(notdir $(<:.S=.lst)) $(ADEFS)
-CFLAGS    = $(MCFLAGS) $(OPT) $(COPT) $(CWARN) -Wa,-alms=$(LSTDIR)/$(notdir $(<:.c=.lst)) $(DEFS)
-CPPFLAGS  = $(MCFLAGS) $(OPT) $(CPPOPT) $(CPPWARN) -Wa,-alms=$(LSTDIR)/$(notdir $(<:.cpp=.lst)) $(DEFS)
+ASFLAGS   = $(MCFLAGS) $(ADEFS)
+ASXFLAGS  = $(MCFLAGS) $(ADEFS)
+CFLAGS    = $(MCFLAGS) $(OPT) $(COPT) $(CWARN) $(DEFS)
+CPPFLAGS  = $(MCFLAGS) $(OPT) $(CPPOPT) $(CPPWARN) $(DEFS)
 ifeq ($(USE_LINK_GC),yes)
   LDFLAGS = $(MCFLAGS) -nostartfiles -T$(LDSCRIPT) -Wl,-Map=$(BUILDDIR)/$(PROJECT).map,--cref,--no-warn-mismatch,--gc-sections $(LLIBDIR)
 else